An Iowa man with a history of confrontations with the law is suspected of ambushing and killing two Des Moines-area police officers in separate shootings early Wednesday morning.

Officials have not given a possible motive for the attacks, but the suspect had recently complained about police ejecting him from a local high school football game for waving a Confederate flag at black attendees during the national anthem.

For the record:

7:02 PM, Aug. 22, 2019

An earlier version of this article identified the suspect as Sean Michael Greene. His name is Scott Michael Greene.

Scott Michael Greene, 46, was detained without incident on a rural road after flagging down a state Department of Natural Resources employee and asking the employee to call 911, said Des Moines Police Sgt. Paul Parizek.